#mongodb logs for Wednesday the 15th of January, 2020

[13:17:42] <QuanRan> hi, im trying to filter the results of my collection based on a creation timestamp ; anyone knows why the filter on this picture returns no results when there should be ? https://imgur.com/kLrUsw8

[13:19:11] <QuanRan> I have documents that are after 2017-12-31, so i don't understand why i get no results

[13:55:10] <GothAlice> QuanRan: Potentially the same problem as https://stackoverflow.com/questions/55386030/mongodb-cant-query-subdocument-by-id-returns-null/55386123#55386123 except not about IDs, but dates. What you've queried for is not a date, it's a string. A text string. What's the actual value of one of those "features.creationTimestap" fields?

[13:55:21] <GothAlice> If it's an ISODate, then you must cast, as per that SO answer.

[22:25:27] <jnewt> when the application that uses mongo starts, i am getting a UPGRADE PROBLEM: The data files need to be fully upgraded to version 3.4 before attempting to upgrade to 3.6. I am not sure what I did wrong. i ran the commands in the upgrade document, but have no direct experience with mongo